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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Ben Woodcroft <donttrustben@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
;; TODO: Are all of these imports used?
(define-module (guix import github)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (json)
#:use-module (guix utils)
#:use-module ((guix download) #:prefix download:)
#:use-module (guix import utils)
#:use-module (guix packages)
#:use-module (guix upstream)
#:use-module (gnu packages)
#:export (%github-updater))
(define (json-fetch* url)
"Return a list/hash representation of the JSON resource URL, or #f on
failure."
(call-with-output-file "/dev/null"
(lambda (null)
(with-error-to-port null
(lambda ()
(call-with-temporary-output-file
(lambda (temp port)
(and (url-fetch url temp)
(call-with-input-file temp json->scm)))))))))
;; TODO: is there some code from elsewhere in guix that can be used instead of
;; redefining?
(define (find-extension url)
"Return the extension of the archive e.g. '.tar.gz' given a URL, or
false if none is recognized"
(find (lambda x (string-suffix? (first x) url))
(list ".tar.gz" ".tar.bz2" ".tar.xz" ".zip" ".tar")))
(define (github-package? package)
"Return true if PACKAGE is a package from GitHub."
(define (github-url? url)
(and
(string-prefix? "https://github.com/" url)
(let ((ext (find-extension url)))
(and ext
(or
(string-suffix?
(string-append "/archive/v" (package-version package) ext) url)
(string-suffix?
(string-append "/archive/" (package-version package) ext) url)
(string-suffix?
(string-append "/archive/" (package-name package) "-"
(package-version package) ext)
url)
(string-suffix?
(string-append "/releases/download/v" (package-version package)
"/" (package-name package) "-"
(package-version package) ext)
url)
(string-suffix?
(string-append "/releases/download/" (package-version package)
"/" (package-name package) "-"
(package-version package) ext)
url))))))
(let ((source-url (and=> (package-source package) origin-uri))
(fetch-method (and=> (package-source package) origin-method)))
(and (eq? fetch-method download:url-fetch)
(match source-url
((? string?)
(github-url? source-url))
((source-url ...)
(any github-url? source-url))))))
(define (github-user-slash-repository url)
"Return a string e.g. arq5x/bedtools2 of the owner and the name of the
repository separated by a forward slash, from a string URL of the form
'https://github.com/arq5x/bedtools2/archive/v2.24.0.tar.gz'"
(let ((splits (string-split url #\/)))
(string-append (list-ref splits 3) "/" (list-ref splits 4))))
(define %github-token
;; Token to be passed to Github.com to avoid the 60-request per hour
;; limit, or #f.
;; QUESTION: is there a need to check that the token looks like a token, for
;; security, since it gets used in a fetch as is?
(make-parameter (getenv "GUIX_GITHUB_TOKEN")))
(define (latest-released-version url package-name)
"Return a string of the newest released version name given a string URL like
'https://github.com/arq5x/bedtools2/archive/v2.24.0.tar.gz' and the name of
the package e.g. 'bedtools2'. Return #f if there is no releases"
(let* ((token (%github-token))
(api-url (string-append
"https://api.github.com/repos/"
(github-user-slash-repository url)
"/releases"))
(json (json-fetch*
(if token
(string-append api-url "?access_token=" token)
api-url))))
(if (eq? json #f)
(if token
(error "Error downloading release information through the GitHub
API when using a GitHub token")
(error "Error downloading release information through the GitHub
API. This may be fixed by using an access token and setting the environment
variable GUIX_GITHUB_TOKEN, for instance one procured from
https://github.com/settings/tokens"))
(let ((proper-releases
(filter
(lambda (x)
;; example pre-release:
;; https://github.com/wwood/OrfM/releases/tag/v0.5.1
;; or an all-prerelease set
;; https://github.com/powertab/powertabeditor/releases
(eq? (assoc-ref (hash-table->alist x) "prerelease") #f))
json)))
(if (eq? (length proper-releases) 0) #f ;empty releases list
(let*
((tag (assoc-ref (hash-table->alist (first proper-releases))
"tag_name"))
(name-length (string-length package-name)))
;; some tags include the name of the package e.g. "fdupes-1.51"
;; so remove these
(if (and (< name-length (string-length tag))
(string=? (string-append package-name "-")
(substring tag 0 (+ name-length 1))))
(substring tag (+ name-length 1))
;; some tags start with a "v" e.g. "v0.25.0"
;; where some are just the version number
(if (eq? (string-ref tag 0) #\v)
(substring tag 1) tag))))))))
(define (latest-release guix-package)
"Return an <upstream-source> for the latest release of GUIX-PACKAGE."
(let* ((pkg (specification->package guix-package))
(source-uri (origin-uri (package-source pkg)))
(name (package-name pkg))
(version (latest-released-version source-uri name)))
(if version
(upstream-source
(package guix-package)
(version version)
(urls (list source-uri)))
#f)))
(define %github-updater
(upstream-updater
(name 'github)
(description "Updater for GitHub packages")
(pred github-package?)
(latest latest-release)))
|